There are several types of non-protein catalysts, which are also called enzymes. The biggest group are RNA ribozymes, along with some lipid-modified proteins.
Enzymes
No, this is not always true. Almost all enzymes are made of protein, but now it has been dixcovered that certain types of RNA can function as enzymes also (spliceosomes are an organelle that use enzymatic RNA).
Yes, almost all work on a single substrate.
Enzymes are used in almost every biological reaction that takes place in an organism to expedite the process.
No, nucleic acids are not enzymes. Nucleic acids are made up of nucleotides where as enzymes are proteins, but all proteins are not enzymes.
Enzymes
Yes, almost all enzymes are proteins. Enzymes are a type of protein that act as biological catalysts, speeding up chemical reactions in living organisms. There are also some RNA molecules called ribozymes that can act as enzymes.
No, this is not always true. Almost all enzymes are made of protein, but now it has been dixcovered that certain types of RNA can function as enzymes also (spliceosomes are an organelle that use enzymatic RNA).
Yes, almost all work on a single substrate.
but all catalysts aren't enzymes...
Sort of Enzymes are proteins that increase the rate of chemical reations, they convert molecues from substrates ( a substrate is a molecue upon which an enzyme atc acts ) to products(a product is something "manufactured" by an enzyme from its substrate)Definition in link below.
Enzymes are used in almost every biological reaction that takes place in an organism to expedite the process.
Pepsinogen is an inactive form of the digestive enzyme pepsin. Almost all enzymes are proteins, and proteins are organic macromolecules.
No, nucleic acids are not enzymes. Nucleic acids are made up of nucleotides where as enzymes are proteins, but all proteins are not enzymes.
Amylase is an enzyme. Almost all enzymes end with -ase. This enzyme works on complex carbohydrates to simple carbohydrates like sugars.
Enzymes are not destroyed during chemical reactions.
All Enzymes are composed of, and from, Proteins.